Records of six leucosioid species from the Ryukyu Title Archipelago, Japan

Naruse, Tohru; Maenosono, Tadafumi; Uyeno, Daisuke; Author(s) Samejima, Shota; Shirawakawa, Naoki

Citation Fauna Ryukyuana, 36: 1-11

Issue Date 2017-05-31

URL http://hdl.handle.net/20.500.12000/38800

Rights Fauna Ryukyuana ISSN 2187-6657 http://w3.u-ryukyu.ac.jp/naruse/lab/Fauna_Ryukyuana.html

Records of six leucosioid crab species from the Ryukyu Archipelago, Japan

Tohru Naruse1, Tadafumi Maenosono2, Daisuke Uyeno3, Shota Samejima4 & Naoki Shirakawa5 1Tropical Biosphere Research Center, Iriomote Station, University of the Ryukyus, 870 Uehara, Taketomi, Okinawa 907-1541, Japan ([email protected]) 2Kankyosha, 1-4-5 102 Kyozuka, Urasoe, Okinawa 901-2111, Japan 3Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan 4Okinawa Prefectural Sea Farming Center, 853-1 Ohama, Motobu, Okinawa 905-0212, Japan 5Dolphin Kick, Tomari, Naha, Okinawa 900-0012, Japan

Abstract. Six species of leucosioid are Measurements refer to as carapace length (CL; reported from the Ryukyu Islands in this paper: distance between levels of frontal margin or distal Arcania sagamiensis Sakai, 1969, Ebalia stellaris ends of spines and posterior margin or distal ends of Naruse & Ng, 2006, Ebaliopsis erosa (A. Milne- spines) × carapace width (CW; maxima width, Edwards, 1873), Myra eudactylus (Bell, 1855), including spines if any) in millimeters. Urnalana elata (A. Milne-Edwards, 1874) (); and Iphiculus spongiosus Adams & Species account White, 1849 (Iphiculidae). Ebaliopsis erosa are Superfamily Leucosioidea Samouelle, 1819 recorded from Japanese waters for the first time; all Family Leucosiidae Samouelle, 1819 but Ebalia stellaris and M. eudactylus are recorded Arcania sagamiensis Sakai, 1969 from the Ryukyu Islands based on the specimens for [Japanese name: Sagami-toge-kobushi] the first time. Taxonomic notes are also provided for (Fig. 1A) some selected species. Material examined. RUMF-ZC-3785, 1 ovigerous Introduction female, 12.1 × 11.8 mm, Sumuide, Yagaji Island, adjacent to Okinawa Island, intertidal, coll. T. Recent intensive field works mainly by the second Maenosono, 23 Apr. 2016; RUMF-ZC-4266, 1 male, author have contributed much to the discovery of a 9.3 × 8.9 mm, Yakena, Okinawa Island, coll. J. Nawa, number of taxonomically and/or biogeographically 15 Jul. 2007; RUMF-ZC-4267, 1 juvenile, 6.2 × 5.6 interesting brachyuran crabs from the Ryukyu mm, Kaichu-doro, off Okinawa Island, intertidal; Islands (e.g. Naruse & Maenosono 2014; RUMF-ZC-4282, 1 male, 11.3 × 10.5 mm, Yakata, Maenosono 2015a; 2015b; 2016; Maenosono & Onna, Okinawa Island, intertidal, coll. T. Maenosono, Naruse 2015; 2016a; 2016b; Maenosono et al. 2015). 10 Apr. 2009; RUMF-ZC-4283, 1 male, 9.1 × 9.1 In this paper, we report on six species of the mm, Yabuchi Island, adjacent to Okinawa Island, superfamily Leucosioidea, Arcania sagamiensis intertidal, coll. T. Maenosono, 26 Apr. 2009; RUMF- Sakai, 1969, Ebalia stellaris Naruse & Ng, 2006, ZC-4284, 1 female, 13.0 × 12.9 mm, Ukaji, Onna, Ebaliopsis erosa (A. Milne-Edwards, 1873), Myra Okinawa Island, subtidal (> -2 m), coll. T. eudactylus (Bell, 1855), Urnalana elata (A. Milne- Maenosono, 31 Mar. 2010; RUMF-ZC-4285, 1 Edwards, 1874) (Leucosiidae), and Iphiculus juvenile, 4.8 × 4.7 (damaged) mm, Sesoko Island, spongiosus Adams & White, 1849 (Iphiculidae). adjacent to Okinawa Island, subtidal (> -2 m), coll. Ebaliopsis erosa is recorded from Japanese waters T. Maenosono, 11 May 2010; RUMF-ZC-4286, 1 for the first time; all but Ebalia stellaris and M. male, 7.5 × 7.2 mm, Kaichu-doro, off Okinawa eudactylus are recorded from the Ryukyus for the Island, intertidal, coll. T. Maenosono, 28 Oct. 2011. first time. Comparative material. Arcania sagamiensis: Material examined are deposited in the WNHN-NA-Cr.0191, 1 male, 10.2 × 10.0 mm, 1 Department of Zoology (NSMT-Cr) and the Showa female, 13.3 × 13.1 mm, dry, Kamiura, Kushimoto, Memorial Institute (NSMT-R), the National Museum Wakayama Prefecture, intertidal, 10 Aug 1979, coll. of Nature and Science, Tsukuba; Ryukyu University S. Nagai; WNHN-NA-Cr.0191, 1 male, 11.8 × 11.7 Museum, Fujukan (RUMF), University of the mm, dry, Ogasawara Islands, coll. Mr. Ozato, Jun. Ryukyus, Japan; and the Wakayama Prefectural 1988. Museum of Natural History (WMNH), Wakayama. Coloration. Fig. 1A. Carapace and pereopods

1

Fig. 1. Arcania sagamiensis Sakai, 1969, and Ebalia stellaris Naruse & Ng, 2006. A, A. sagamiensis (RUMF-ZC-3785, CL 12.1 mm, ovigerous female, Yagaji Island); B, E. stellaris (RUMF-ZC-4307, CL 2.5 mm, ovigerous female, between Iriomote and Hatoma Islands). 図 1. サガミトゲコブシとホシズナエバリア. A, サガミトゲコブシ (RUMF-ZC-3785, CL 12.1 mm, 抱卵雌, 屋 我地島産); B, ホシズナエバリア (RUMF-ZC-4307, CL 2.5 mm, 抱卵雌, 西表–鳩間島沖産). with whitish base color. Top of both small and large Material examined. RUMF-ZC-4307, 1 ovigerous granules on the dorsal surface of the carapace orange, female, 2.5 × 3.7 mm, between Iriomote and except for whitish granuels on posterolateral to Hatoma Island, 24°26.514′N 123°49.237′E -32 m – posterior margins. 24°26.517′N 123°49.234′E -35 m, dredge, coll. T. Habitat. The present specimens were all Naruse et al., 18 Jul. 2014. collected from lower intertidal to shallow subtidal Comparative material. Ebalia stellaris: NSMT- sandy substratum around seagrass beds, usually Cr 21751, 1 male, 2.5 × 3.1 mm, south off Nagannu mixed with dead coral gravels. Island, Kerama Island group, Ryukyu Islands, Distribution. China (Hainan Island); Taiwan 26°14.34′ N 127°32.66′ E – 26°14.42′ N 127°32.50′ (Siaoliouciou Island); Japan (Okinawa Island; Kii E, -41.4–46.0 m, dredge, TRV Toyoshio Maru 2007 Peninsula; Manazuru Peninsula, Sagami Bay [type cruise, stn 8, coll. H. Komatsu, 25 May 2008; locality]; Ogasawara Islands); Fiji; Western Samoa NSMT-Cr 21752, 1 young female, 3.0 2.3 × 3.0 mm, (Sakai 1969; Marumura 1985; Dai et al. 1986; Galil Ankyaba, Kakeroma Island, Amami Island group, 2001a; Marumura & Kosaka 2003; Lin et al. 2014; Ryukyu Islands, -12 m, sandy bottom, SCUBA, TRV present study). Toyoshio Maru 2003 cruise, coll. T. Akiyama, 26 Remarks. Arcania sagamiensis was described May 2003. based on the specimens collected from Manazuru, Ebalia humilis Takeda, 1977: NSMT-Cr 11298, 1 Sagami Bay (Sakai 1969). The specimens examined male, 2.9 × 3.4 mm, Miyanohama, Chichi-jima in this study morphologically agree well with the Island, Ogasawara Islands, -25 m, SCUBA, coll. H. original description as well as the specimen from Tachikawa, 5 Jan. 1993; NSMT-Cr 18305, 1 ovig. mainland Japan. female, 2.9 × 3.6 mm, Takinoura, Ani-jima Island, Although A. sagamiensis is rather common in the Ogasawara Islands, -8 m, SCUBA, coll. H. above habitat in Okinawa Island, there are only a few Tachikawa, 3 April 1994. distributional records from the northwestern to Coloration. Fig. 1B. Ivory overall. Also see southwestern Pacific. Naruse & Ng (2006) for different color pattern. Habitat. The specimen examined in this study Ebalia stellaris Naruse & Ng, 2006 was collected by dredging on the seabed of dead [Japanese name: Hoshizuna-Ebalia] coral gravels. Naruse & Ng (2006) noted that the (Fig. 1B) holotype was collected from very fine sandy substratum. Range of the depths of known habitat is

2 [記録] 成瀬ら: コブシガニ上科 6 種の琉球列島からの記録

Fauna Ryukyuana, 36: 1–11.

Fig. 2. Ebaliopsis erosa (A. Milne-Edwards, 1873). A, RUMF-ZC-4277 (CL 10.0 mm, female, Okinawa Island); B, RUMF-ZC-4279 (CL 8.6 mm, male, Okinawa Island). 図 3. クルミコブシ (新称). A, RUMF-ZC-4277 (CL 10.0 mm, 雌, 沖縄島産); B, RUMF-ZC-4279 (CL 8.6 mm, 雄, 沖縄島産).

-12–46 m (Naruse & Ng 2006; Komatsu et al. 2011; Island, intertidal, coll. T. Maenosono, 8 Apr. 2008; this study). RUMF-ZC-4260, 1 female, 11.4 × 10.6 mm, Omine Distribution. Ryukyu Islands (known from Coast, Naha, Okinawa Island, intertidal, coll. T. around islands of Kakeroma, Nagannu, Okinawa Maenosono, 7 May 2008; RUMF-ZC-4261, 1 female, (Nakagusuku Bay) and Iriomote) (Naruse & Ng 10.0 × 8.7 mm, Horikawa, Tamagusuku, Okinawa 2006; Komatsu et al. 2011; this study). Island, intertidal, coll. T. Maenosono, 21 Aug. 2008; Remarks. Ebalia stellaris had been known by an RUMF-ZC-4262, 1 male, 6.4 × 5.3 mm, Noho Island, only female holotype until Komatsu et al. (2011) adjacent to Iheya Island, subtidal, coll. T. reported additional one male and one female Maenosono, 24 Sep. 2008; RUMF-ZC-4263, 1 male, specimens. They showed a striking sexual 4.6 × 3.9 mm, Yamada, Onna, Okinawa Island, dimorphism for E. stellaris and allied E. humilis and intertidal, coll. T. Maenosono, 16 Oct. 2008; RUMF- reassessed the diagnostic characters of the two ZC-4264, 1 female, 10.8 × 9.2 mm, Omine Coast, species; “E. stellaris can be distinguished from E. Naha, Okinawa Island, intertidal, coll. T. Maenosono, humilis by the carapace being 1.5 times broader than 12 Oct. 2008; RUMF-ZC-4265, 1 female, 6.2 × 5.6 long in female (vs. 1.2 times in E. humilis); the mm, Yabuchi Island, adjacent to Okinawa Island, lateral angle of the carapace is smaller than intertidal, coll. T. Maenosono, 26 Oct. 2008; RUMF- metabranchial tooth (vs. larger); the male telson is ZC-4275, 1 female, 11.1 × 9.7 mm, Seragaki, Onna, elongate-triangular (vs. tongue-shaped); the distal Okinawa Island, intertidal, coll. T. Maenosono, 12 part of G2 is straight and directed mesially (vs. Feb. 2009; RUMF-ZC-4276, 1 male, 7.6 × 6.3 mm, curled abdominally)” (Komatsu et al. 2011). The Yakata-katabaru, Onna, Okinawa Island, intertidal, female specimen collected from off Iriomote Island coll. T. Maenosono, 10 Apr. 2009; RUMF-ZC-4277, has diagnostic characters that are applicable for the 1 female, 10.0 × 8.7 mm, Ukaji, Onna, Okinawa female and is identified here as E. stellaris. Island, subtidal (> -2 m), coll. T. Maenosono, 31 Mar. The specimen from Iriomote carries 44 eggs 2010; RUMF-ZC-4278, 1 female, 11.2 × 9.6 mm, (diameter ca. 0.31 mm). Minatogawa, Urasoe, Okinawa Island, intertidal, coll. T. Maenosono, 12 Jul. 2010; RUMF-ZC-4279, 1 Ebaliopsis erosa (A. Milne-Edwards, 1873) male, 8.6 × 7.2 mm, Minatogawa, Urasoe, Okinawa [New Japanese name: Kurumi-kobushi] Island, intertidal, coll. T. Maenosono, 9 Sep. 2010; (Fig. 2) RUMF-ZC-4280, 1 male, 7.1 × 6.0 mm, Kita-nashiro, Itoman, Okinawa Island, intertidal, coll. T. Material examined. RUMF-ZC-4259, 1 female, Maenosono, 19 Dec. 2010. 11.5 × 9.8 mm, Senaga Island, adjacent to Okinawa Coloration. Fig. 2. Beige to ivory overall.

[Record] Naruse et al.: Six leucosioid crabs from the Ryukyus 3

Fig. 3. Myra eudactylus (Bell, 1855). A, RUMF-ZC-2862 (CL 21.5 mm, male, Okinawa Island); B, RUMF-ZC-3924 (CL 24.6 mm, female, Okinawa Island). 図 3. ノコバテナガコブシ. A, RUMF-ZC-2862 (CL 21.5 mm, 雄, 沖縄島産); B, RUMF-ZC-3924 (CL 24.6 mm, 雌, 沖縄島産).

Habitat. Similar habitat to that of Arcania Edwards 1873; 1874; Komatsu et al. 2004). Instead, sagamiensis. merus of the cheliped is rather coarsely granulated. Distribution. Mauritius; Maldive Archipelago; It is uncertain whether Ward’s (1942) “E. erosa” has Laccadive Archipelago; Minicoy Lagoon; Andaman a different condition in cheliped manus or he Islands; Indonesia [Balabalagan (=Paternoster) misdescribed merus as manus. The present study Islands; Banda Sea; Pulau Rote (=Rotti); Pulau referrs the Ryukyu specimens to E. erosa. Komatsu Geser (=Gisser Island)]; Philippines (Marinduque); et al. (2004) redescribed the morphology in detail. Japan (Okinawa Island); Australia [Bass Strait [type This record represents the first record of the locality]; Queensland]; New Caledonia; Fiji; genus and the species from Japan and expands the Funafuti, Tuvalu (A. Milne-Edwards 1873; 1874; distributional range of the species to the north. Ortmann 1892; Alcock 1896; Borradaile 1900; 1903; The standard Japanese name “Kurumi-kobushi” Bouvier 1915; Ihle 1918; McNeil & Ward 1930; is proposed here. RUMF-ZC-4279 is designated as a Komatsu et al. 2004; present study). standard specimen for the Japanese name of E. erosa. Remarks. Ebaliopsis Ihle, 1918, contains two species, E. erosa (A. Milne-Edwards, 1873) [type Myra eudactylus (Bell, 1855) locality: Bass Strait] and E. vadieri Ward, 1942 [type [Japanese name: Nokoba-tenaga-kobushi] locality: Mauritius]. The specimens examined in this (Fig. 3) study agree with the descriptions of E. erosa (A. Milne-Edwards 1873; 1874; Ortmann 1892; Ihle Material examined. RUMF-ZC-2862, 1 male, 21.5 1918), especially in anteriorly smooth and × 15.7 mm, Off Sedake, Oura Bay, Okinawa Island, posteriorly granulated dorsal surface of the carapace. -20 m, coll. D. Uyeno, 9 Feb. 2013; RUMF-ZC-3924, When Ward (1942) described E. vadieri, he 1 female, 24.6 × 19.2 mm, Awa, Nago Bay, Okinawa compared it with E. erosa from off Michaelmas Bay, Island, -10–15 m, muddy substratum, coll. N. near Cairnes, Queensland. He noted that “the upper Shirakawa, 6 Nov. 2014. surface of the manus are finely granulated in E. Comparative material. RUMF-ZC-2868, 1 viarderi, whereas they are coarsely so in E. erosa” female, 41.9 × 32.7 mm, Masbate, Philippines, coll. (Ward 1942: 67). However, such condition of the local fisherman, taken with tangle net (50–100 m manus of E. erosa is neither observed in the depth). specimens from the Ryukyus nor described in other Coloration. Fig. 3. Carapace beige, anterior half articles including the original description (A. Milne- becomes slightly darker (Fig. 3A) to purplish (Fig.

4 [記録] 成瀬ら: コブシガニ上科 6 種の琉球列島からの記録

Fauna Ryukyuana, 36: 1–11.

3B), with narrow to wide longitudinal white line 10.3 × 10.4 mm, Hayama, Sagami Bay, coll. the late from around front, and orange dots on mesobranchial, Emperor Hirohito; WNHN-NA-Cr.0240, 1 female, meta branchial, cardiac regions, subdistal portion of 10.8 × 11.1 mm, Ategi? Island, Ehime Prefecture, ambulatory meri, and proximal portions of Japan, -9 m, coll. 7 Aug. 1988. ambulatory carpi and propodi. Coloration. Fig. 4A. Carapace and chelipeds Distribution. Gulf of Aden; Andamans; with beige base color, medially paler, mottled with Singapore; Gulf of Thailand; off Sarawak; Nha orange pattern. Ambulatory legs whitish, with Trang; Gulf of Tonkin; Philippines (Luzon Island; orange marks on middle of anterior margin of meri, Corregidor; Balicasag Island); Japan (Miyako proximo-outer portions of carpi and propodi. Some Island; Okinawa Island); Saleh-Bucht, Sumbawa; small individuals have much paler orange marks and Tanah-Djampeah, Flores Sea; North West Shelf, look almost whitish overall. Western Australia; off SW Merauke, New Guinea; Habitat. Similar habitat with that of Arcania Darnley Island; Great Barrier Reef; Coral Sea; South sagamiensis. Sea; New Caledonia (White 1847; Bell 1855b; A. Distribution. Comoro Islands, Western Australia Milne Edwards 1874; Miers 1886; Ortmann 1892; (Dampier Archipelago; Port Hedland; Broome; Alcock 1896; Rathbun 1910; Ihle 1918; Serène Coulomb Point); Goram Is.; Hansa Bay, Papua New 1955; Zarenkov 1990; Chen 1996; Galil 2001b; Guinea; Philippines (Panglao); Japan (Okinawa Marumura & Takeda 2004; Galil & Ng 2007). Island; Shimabara Peninsula, Nagasaki; Ehime; Remarks. Myra eudactylus (Bell, 1855) was Osaka Bay; Shionomisaki; Sagami Bay) Bikini Atoll, described based on material from the Philippines. Marshall Islands; New Caledonia [type locality]; The species is distinctive in the genus in having short Samoa (A. Milne-Edwards 1874; Sakai 1961; 1965a; and rounded palm with slender and distally incurved 1983; Takeda 1979; Ovaere 1987; Marumura & fingers that are about twice the length of the palm Kosaka 2003; Galil 2005; Galil & Ng 2007; present (Galil 2001b). study). Remarks. Sakai (1961) described Leucosia Urnalana elata (A. Milne-Edwards, 1874) sagamiensis on the basis of the male holotype from [Japanese name: Sagami-kobushi] Hayama, Sagami Bay, and a female from Shimabara (Fig. 4) Peninsula. He differentiated it from morphologically close L. elata A. Milne-Edwards, 1874 [type Material examined. RUMF-ZC-3786, 1 male, 9.6 × locality: New Caledonia], by “the broader carapace, 9.1 mm, Sumuide, Yagaji Island, adjacent to shorter neck and much larger tubercles on the Okinawa Island, intertidal, coll. T. Maenosono, 23 anterior border of the merus of the cheliped” (Sakai Apr. 2016; RUMF-ZC-4268, 1 female, 5.9 × 6.0 mm, 1961: 134). Later Galil (2005) synonymized L. Odo Coast, Itoman, Okinawa Island, intertidal, coll. sagamiensis and L. bikiniensis Sakai, 1983 [type T. Maenosono, 30 Oct. 2008; RUMF-ZC-4269, 1 locality: Bikini Atoll] with L. elata A. Milne- female, 8.3 × 8.2 mm, Kaichu-doro, off Okinawa Edwards, 1874, and also established a new genus Island, intertidal, coll. T. Maenosono & T. Naruse, 11 Urnalana [type species: Leucosia haematosticta Jan. 2009; RUMF-ZC-4270, 1 male, 9.0 × 8.5 mm, Adams & White, 1849] to accommodate L. elata, Kaichu-doro, off Okinawa Island, intertidal, coll. T. other 12 species previously assigned to Leucosia, Maenosono, 15 Nov. 2008; RUMF-ZC-4271, 2 and her three new species. males, 5.3 × 5.3, 7.3 × 7.0 mm, Futami, Nago, Galil (2005) examined the syntypes of Urnalana Okinawa Island, intertidal, coll. T. Maenosono, 14 elata and provided a photograph of a topotypic Apr. 2009; RUMF-ZC-4272, 1 male, 9.2 × 8.8 mm, specimen (Galil 2005: fig. 1D, male, CL 9.2 mm, Ukaha Island, off Okinawa Island, subtidal (> -2 m), Touho, New Caledonia, coll. Sep. 1993) (Galil, coll. T. Maenosono, 10 May 2010; RUMF-ZC-4273, personal communication). Considering the 1 male, 6.7 × 6.5 mm, Kaichu-doro, off Okinawa difference in A. Milne-Edwards’s (1874: pl. 2, fig. 2) Island, intertidal, coll. T. Maenosono, 2 Jan. 2011; drawing of the syntype and the photograph of the RUMF-ZC-4274, 1 male, 7.2 × 6.9 mm, Cape topotypic specimen (Galil 2005: fig. 1D), as Galil Chinen, Nanjo, Okinawa Island, intertidal, coll. T. (2005) mentioned, the former may be inaccurate in Maenosono, 8 May 2011; RUMF-ZC-4281, 1 male, its relatively narrow and long front. 7.8 × 7.6 mm, Inanse, Urasoe, Okinawa Island, We have examined a number of specimens from subtidal (> -2 m), coll. T. Maenosono, 22 Dec. 2010. the Ryukyus (see Material examined), and they did Comparative material. Urnalana elata: NSMT- not show any particular variations on the shape of the R 2699, holotype of Leucosia sagamiensis, male, carapace and chelipeds in association with sex and

[Record] Naruse et al.: Six leucosioid crabs from the Ryukyus 5

Fig. 4. Urnalana elata (A. Milne-Edwards, 1874). A, RUMF-ZC-3786 (CL 9.6 mm, male, Yagaji Island); B, NSMT-R 2699 (holotype of Leucosia sagamiensis Sakai, 1961, CL 10.3 mm, male, Sagami Bay). 図 4. サガミコブシ. A, RUMF-ZC-3786 (CL 9.6 mm, 雄, 屋我地島産); B, NSMT-R 2699 (Leucosia sagamiensis Sakai, 1961 のホロタイプ, CL 10.3 mm, 雄, 相模湾産). size differences. Examination of the holotype of WMNH-Na-Cr. 0208, 2 females, 10.7 × 16.6, 14.6 × Leucosia sagamiensis (Fig. 4B) confirms that the 22.7 mm, dry, off Uragami, Nachi-Katsuura, holotype and the Ryukyuan material are conspecific. Wakayama Prefecture, trawl, -120–150 m, coll. S. These specimens from Japan are morphologically Nagai, Feb. 1980; RUMF-ZC-2865, 1 male, 11.6 × very close to the photograph of the topotypic 18.5 mm, dry, Lio-an, Cebu, Philippines, tangle net, specimen (Galil 2005: fig. 1D). A possible difference coll. 2014. observed is the presence of large granules on the Preserved color. Fig. 5A. Ocher overall. proximal-middle portion of the upper surface of Distribution. Djibouti; Red Sea; Persian Gulf; cheliped merus (Fig. 4B), which is hard to recognize Gulf of Oman; Mekran Coast; Bay of Bengal; in Galil (2005: fig. 1D) although it may be due to Andamans; Singapore; Gulf of Thailand; Nhatrang; limited resolution of the photograph. The present Gulf of Tonkin, South China Sea; Guangdong; near study prefers to maintain the current status of L. Hong Kong; Philippines (Manila Bay to Lubang sagamiensis and identifies Ryukyuan material as U. Island; Off NE Luzon; N Lungsod ng Roxas, Panay elata. Island; Ragay Gulf; Panglao); Taiwan; Japan Urnalana elata becomes the fourth Urnalana (Okinawa; Kochi; Wakayama; Manazuru); species recorded from the Ryukyu Islands. The other Indonesia (Madura; Teluk Bima; North Sulawesi; three species are U. pulchella (Bell, 1855) (by Kai Islands); Western Australia; Arafra Sea; Takeda 1989, as Leucosia alcocki Ovaere, 1987), U. Rendova, Solomon Islands (Adams & White 1849; insularis Takeda & Kurata, 1976, and U. purarensis Miers 1884; Alcock 1896; Lanchester 1900; Nobili (Ovaere, 1987) (both by Komatsu & Takeda 2009). 1906; Stimpson 1907; Rathbun 1910; Ihle 1918; See Galil (2005) for their distinguishing characters. Stephensen 1946; Lin 1949; Serène 1955; Sakai 1965b; Zarenkov 1969; Serène & Vadon 1981; Family Iphiculidae Alcock, 1896 Miyake 1983; Dai et al. 1986; Chen 1989; Marumura Iphiculus spongiosus Adams & White, 1849 & Kosaka 2003; Naderloo & Sari 2005; Galil 2007; [Japanese name: Nokoha-kobushi] Galil & Ng 2007; 2009; Poore et al. 2008). (Fig. 5) Remarks. The genus Iphiculus Adams & White, 1849 is represented by two species, I. spongiosus and Material examined. RUMF-ZC-3925, 1 male, 8.9 × I. convexus Ihle, 1918. The former species is easily 14.1 mm, gut contents of a Freckled goatfish, recognized by the prominent lateral teeth on the Upeneus tragula, purchased at Yonashiro Fisheries carapace. The lateral carapace teeth appear to grow Cooperative, Henza Island, coll. S. Samejima, 14 Jun. proportionally longer in larger individuals (Fig. 5). 2010. The specimen examined in this study (Fig. 5A) Comparative material. Iphiculus spongiosus: was collected from the gut contents of Upeneus

6 [記録] 成瀬ら: コブシガニ上科 6 種の琉球列島からの記録

Fauna Ryukyuana, 36: 1–11.

Fig. 5. Iphiculus spongiosus Adams & White, 1849. A, RUMF-ZC-3925 (CL 8.9 mm, male, Henza Island); B, WMNH- Na-Cr. 0208 (CL 10.7 mm, female, Wakayama); C, RUMF-ZC-2865 (CL 11.6 mm, male, Cebu); D, WMNH-Na-Cr. 0208 (CL 14.6 mm, female, Wakayama). 図 5. ノコハコブシ. A, RUMF-ZC-3925 (CL 8.9 mm, 雄, 平安座島産); B, WMNH-Na-Cr. 0208 (CL 10.7 mm, 雌, 和歌山産); C, RUMF-ZC-2865 (CL 11.6 mm, 雄, セブ島産); D, WMNH-Na-Cr. 0208 (CL 14.6 mm, 雌, 和歌山産). tragula. Adams, A. & A. White, 1848–1849. Crustacea. In: A. Adams (ed.), The Zoology of the voyage of Acknowledgements H.M.S. Samarang; under the command of Captain Sir Edward Belcher, C.B., F.R.A.S., We are greatful to Kentaro Hirashima (Wakayama F.G.S., during the years 1843–1846. Pp. Part I and Prefectural Museum of Natural History) and II: 1–66, pls. 1–13, Reeve, Bentham, and Reeve, Hironori Komatsu (National Museum of Nature and London. Science, Tokyo) for their help in accessing Alcock, A., 1896. Materials for Carcinological specimens. Comments from Tomoyuki Komai and Fauna of India. No. 2. The Brachyura an anonymous reviewer improves the manuscript. Oxystomata. Journal of the Asiatic Society of Thanks are also due to Bella Galil (National Institute Bengal, 65(2): 134–296. of Oceanography, Israel Oceanographic and Bell, T., 1855a. Horae carcinologicae, or notices of Limnological Research) who kindly shared the Crustacea. I. A monograph of the Leucosiadae information on the type specimen of Urnalana elata, [sic], with observations on the relations, structure, Yoshihisa Fujita (Okinawa Prefectural University of habits and distribution of the family, a revision of Arts) James Davis Reimer (University of the the generic characters, and descriptions of new Ryukyus) for editing this paper. genera and species. In: June 5. Thomas Bell, Esq., President, in the Chair. Proceedings of the References Linnean Society of London, 2(64–65): 428–435. Bell, T., 1855b. Horae carcinologiae, or notices of

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Crustacea. I. A monograph of the Leucosiadae Euclosia Galil, 2003 (Crustacea, , [sic], with observations on the relations, structure, Brachyura). Zoosystema, 29(3): 555–563. habits and distribution of the family: a revision of Galil, B.S. & P.K.L. Ng, 2007. Leucosiid crabs from the generic characters and descriptions of new Panglao, Philippines, with descriptions of three genera and species. Transactions of the Linnean new species (Crustacea: Decapoda: Brachyura). Society of London, 21(4): 277–314, pls. 30–34. Raffles Bulletin of Zoology, Supplement, 16: 79– Borradaile, L.A., 1900. On some from 94. the South Pacific. Part IV. The crabs. Proceedings Galil, B.S. & P.K.L. Ng, 2009. and of the General Meetings for Scientific Business Leucosioidea (Crustacea: Decapoda: Brachyura) of the Zoological Society of London, 1900(3): from Luzon, Philippines, with descriptions of two 568–596. new species of Mursia. Zootaxa, 2085: 45–60. Borradaile, L.A., 1903. Marine crustaceans. IV. Ihle, J.E.W., 1918. Die Decapoda Brachyura der Some Remarks on the Classification of the Crabs. Siboga-Expedition. III. Oxystomata: Calappidae, V. The Crab of the Catometope Families. VI. Leucosiidae, Raninidae. Siboga Expeditie, Oxystomata. VII. The Barnacles. In: J.S. Monographie 39b2: 1–322. Gardiner (ed.), The Fauna and Geography of the Komatsu, H. & M. Takeda, 2009. Rare crabs Maldive and Laccadive Archipelagoes; Being the (Crustacea, Decapoda, Brachyura) from Okinawa Account of the Work carried on and of the Island, with description of a new species of the Collections made by an Expedition during the family Leucosiidae. Bulletin of the National years 1899 and 1900. Vol. 1. Pp. 424–443, pl. 22, Museum of Nature and Science. Series A, University Press, Cambridge. Zoology, 35: 125–136. Bouvier, E.-L., 1915. Décapodes marcheurs Komatsu, H., A. Go, K. Nakaguchi & S. Ohtsuka, (Reptantia) et stomatopodes recueillis a l’île 2011. Description of male Ebalia stellaris Naruse Maurice par M. Paul Carie. Bulletin Scientifique and Ng, 2006 (Crustacea, Decapoda, de la France et de la Belgique, 48(3): 178–318, Leucosiidae), with a revision of the species pls. 12–17. diagnosis. Bulletin of the National Museum of Chen, H., 1989. Leucosiidae (Crustacea, Brachyura). Nature and Science. Series A, 37(4): 195–201. In: J. Forest (ed.), Résultats des Campagnes Komatsu, H., M.R. Manuel, & M. Takeda, 2004. MUSORSTOM, Volume 5. Nouvelle Série. Série Some rare leucosiid crabs (Crustacea, Decapoda, A, Zoologie. Vol. 144. Pp. 181–264, Mémoires du Brachyura) from the Philippines, with description Muséum national d’Histoire naturelle, Paris. of a new species of the genus Arcania. Chen, H., 1996. The Leucosiidae (Crustacea: Biogeography, 6: 75–86. Brachyura) from Nansha Islands and adjacent Lanchester, M.A., 1900. On a collection of waters. In: Studies on marine fauna and flora and crustaceans made at Singapore and Malacca. biogeography of the Nansha Islands and Part I. Crustacea Brachyura. Proceedings of the neighbouring waters II. Pp. 270–309, China Zoological Society of London, 1900: 719–770. Ocean Press, Beijing. Lin, C.C., 1949. A catalogue of brachyurous Dai, A.-Y., S.-L. Yang, Y.Z. Song & G.X. Chen, Crustacea of Taiwan. Quarterly Journal of the 1986. Crabs of the China seas. China Ocean Press, Taiwan Museum, 2(1): 10–33. Beijing. [In Chinese] Lin, C.-W., J.C.Y. Lai & B.S. Galil, 2014. On a Galil, B.S. 2001a. A revision of the genus Arcania collection of leucosiid crabs from the southeast Leach, 1817 (Crustacea: Decapoda: coast of Taiwan. Crustaceana, 87(11–12): 1351– Leucosioidea). Zoologische Mededelingen, 1364. Leiden, 75: 169–205. Maenosono, T., 2015a. Two rafting crabs of the Galil, B.S. 2001b. A revision of Myra Leach, 1817 genus Plagusia Latreille, 1804 (Crustacea: (Crustacea: Decapoda: Leucosioidea). Decapoda: Brachyura: Plagusiidae) collected Zoologische Mededelingen, Leiden, 75: 409–446. from the Ryukyu Archipelago, Japan. Fauna Galil, B.S. 2005. Contributions to the knowledge of Ryukyuana, 26: 9–15. [in Japanese with English Leucosiidae III. Urnalana gen. nov. (Crustacea: abstract] Brachyura). Zoologische Mededelingen, Leiden, Maenosono, T., 2015b. Neosarmatium rotundifrons 79: 9–40. (A. Milne-Edwards, 1869) (Crustacea: Galil, B.S., 2007. The deep-water Calappidae, Decapoda: Brachyura: Sesarmidae) from Matutidae and Leucosiidae of the Solomon Miyako-jima and Iriomote-jima Islands, Ryukyu Islands, with a description of a new species of Archipelago: First distributional record of the

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Decapod Crustacea of the continental margin of Gulf with an appendix: The male pleopoda of the southwestern and central Western Australia: Brachyura. Danish Scientific Investigations in preliminary identifications of 524 species from Iran, 4: 57–237. FRV Southern Surveyor voyage SS10-2005. Stimpson, W., 1907. Report on the Crustacea Museum Victoria Science Reports, 11: 1–106 (Brachyura and Anomura) collected by the North Rathbun, M.J., 1910. The Danish Expedition to Siam Pacific Exploring Expedition, 1853–1856. 1899–1900. V. Brachyura. Konelige Danske Smithsonian Miscellaneous Collections, 49: 1– Videnskabernes Selskat, Naturvidenskabelige 240, 26 pls. Matematiske Afhandlinger, 5(4): 301–367. Takeda, M., 1977. Crabs of the Ogasawara Islands, Sakai, T., 1961. New species of crabs from the V. A collection made by dredging. Memoirs of the collection of His Majesty the Emperor of Japan. National Science Museum, Tokyo, 10: 113–140, Crustaceana, 3(2): 131–150. pls. 12–17. Sakai, K., 1965a. The crabs of Sagami Bay collected Takeda, M., 1979. Systematic and biogeographic by His Majesty the Emperor of Japan. Maruzen notes on the crabs obtained by dredging at the Sea Co. Ltd., Tokyo. around Cape Shionomisaki, Kii Peninsula. Sakai, T., 1965b. Notes from the Carcinological Memoirs of the National Science Museum, 12: Fauna of Japan. (II). Researches on Crustacea, 2: 151–157. [in Japanese with English summary] 37–46, pls. 5–6, frontispieces 2–3. [In Japanese Takeda, M., 1989. Shallow-water Crabs from the and English]. Oshima Passage between Amami-Oshima and Sakai, T., 1969. Two new genera and twenty-two Kakeroma-jima Islands, the Northern Ryukyu new species of crabs from Japan. Proceedings of Islands. Memoirs of the National Science the Biological Society of Washington, 82: 243– Museum, Tokyo, 22: 135–184, pl. 4. 280. Takeda, M. & Y. Kurata, 1976. Crabs of the Sakai, T., 1983. Eight new species of Indo-Pacific Ogasawara Islands. III. Some species collected crabs from the collections of the Smithsonian by coral fishing boats. Bulletin of the National Institution. Proceedings of the Biological Society Science Museum, Tokyo, Series A (Zoology), of Washington, 96(4): 623–631. 2(1): 19–32. Samouelle, G., 1819. The entomologist’s useful Ward, M., 1942. Notes on the Crustacea of the compendium; or an introduction to the Desjardins Museum, Mauritius Institute, with knowledge of British insects, comprising the best descriptions of new genera and species. Mauritius means of obtaining and preserving them, and a Institute Bulletin, 2(2): 49–113, pls. X–XI. description of the apparatus generally used; White, A., 1847. List of the specimens of Crustacea together with the genera of Linné, and the modern in the collection of the British Museum. Pp. i–viii, method of arranging the classes Crustacea, 1–143, British Museum (Natural History), Myriapoda, Spiders, Mites and Insects, from their London. affinities and structure, according to the views of Zarenkov, N.A., 1969. Crabs of the family Dr. Leach. Also an explanation of the terms used Leucosiidae (subfamilies Ebaliinae and Iliinae) in entomology; a calendar of the times of collected in tropical waters of the Indian and the appearance and usual situations of near 3,000 Pacific Ocean. Nauchnye Doklady Vysshei species of British insects; with instructions for Shkoly, Biologicheskie Nauki, 1969(10): 16–26. collecting and fitting up objects for the [In Russian] microscope. London. Zarenkov, N.A., 1990. Crabs of the family Serène, R., 1955. Sur quelques espèces rares de Leucosiidae (subfamilies Philyrinae and Brachyures (Leucosidae) de l’Indo-Pacifique. (2è Leucosiinae) collected in tropical waters of the Partie). Treubia, 23: 137–218, pls 6–11. Pacific and Indian oceans. Biologicheskie Nauki, Serène, R. & C. Vadon, 1981. Crustacés Décapodes: 1: 52–70. [in Russian] Brachyoures Liste préliminaire, description de formes nouvelles et remarques taxonomiques. In: Résultats des Campagnes MUSORSTOM. I— コブシガニ上科 6 種の琉球列島からの記録 Philippines (18–28 Mars 1976). Mémoires ORSTOM. Vol. 91. Pp. 117–140, pls 1–4, 成瀬貫 1•前之園唯史 2•上野大輔 3•鮫島翔太 4• Éditions de l’Office de la Recherche Scientifique 白川直樹 5 et Technique d’Outre-Mer, Paris. 1〒907-1541 沖縄県八重山郡竹富町字上原 870 Stephensen, K., 1946.The Brachyura of the Iranian 琉球大学 熱帯生物圏研究センター西表研究施設

10 [記録] 成瀬ら: コブシガニ上科 6 種の琉球列島からの記録

Fauna Ryukyuana, 36: 1–11.

2〒901-2111 沖縄県浦添市経塚 1-4-5 102 株式 会社かんきょう社 3〒890-0065 鹿児島県鹿児島市郡元 1-21-35 鹿 児島大学大学院理工学研究科 4〒905-0212 沖縄県国頭郡本部町字大浜 853-1 沖縄県栽培漁業センター 5〒900-0012 沖縄県那覇市泊 2-11-8-105 ドル フィンキック

要旨. 琉球列島より得られたコブシガニ上科 6 種 (サガミトゲコブシ Arcania sagamiensis, ホ シズナエバリア Ebalia stellaris, Ebaliopsis erosa, ノコバテナガコブシ Myra eudactylus, サガミコ ブシ Urnalana elata, ノコハコブシ Iphiculus spongiosus) の標本を記録した. それらのうち, Ebaliopsis erosa は日本より初めて, サガミトゲ コブシ•サガミコブシ•ノコハコブシは琉球列島 より初めて, それぞれ標本を基に報告された. また, Ebaliopsis erosa には新標準和名クルミコ ブシを与え, 和名の基準とする標本に RUMF- ZC-4279 を指定した. さらに, 各種の近似種と の識別形質や潜在的な分類学的問題点につい て概説した.

投稿日: 2016 年 5 月 31 日 受理日: 2017 年 4 月 10 日 発行日: 2017 年 5 月 31 日

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